21030040

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1871}}^1$

素因数の和:2163

約数の個数: 32

約数和(自身を含む): 47511360

約数和(自身を除く): 26481320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1871, 2248, 2810, 3742, 5620, 7484, 9355, 11240, 14968, 18710, 37420, 74840, 525751, 1051502, 2103004, 2628755, 4206008, 5257510, 10515020, 21030040]

約数ペア:

[(1, 21030040), (2, 10515020), (4, 5257510), (5, 4206008), (8, 2628755), (10, 2103004), (20, 1051502), (40, 525751), (281, 74840), (562, 37420), (1124, 18710), (1405, 14968), (1871, 11240), (2248, 9355), (2810, 7484), (3742, 5620)]